Lamp



FIG. 1 is a top, front, and right side perspective view of a lamp showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken-line disclosure in the views is understood to represent portions of the article in which the claimed design is embodied, but which forms no part of the claimed design. 

The ornamental design for a lamp, as shown and described. 